Overhead trolley.



PATENTED JULY 5,- 1904.

No.Y 764,039.

C'. C. CHAMBERS.

OVERHEAD TROLLEY.

APPLIGATION :FILED 1113.25. 1904.

NO MODEL.

UNITED STATES Patented July 5, 1904.

CLlDE C. CHAMBERS, OF EVERSON, PENNSYLVANIA.

OVERHEAD TROLLEY.

SPECIFICATION forming part of Letters Patent No. 764,039, dated July 5, 1904.

Application filed February Z5, 1904. Serial No. 195,546. (No model.)

Bc it known that I, CLIDE C. CHAMBERS, a citizen of the United States, residing at Everson, in the county of Fayette andState of Pennsylvania, have invented certain new and useful Improvements in Overhead Trolleys; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to overhead trolleys for electric-railway cars, and particularly to that type of trolley in which the wheel-carrying fork is pivotally mounted on the trolleypole, so as to enable the wheel to swing or change its position when passing around curves, thus preventing the wheel from jumping oli' the wire.

rllhe objects of the invention are to produce an improved and eXceedingly-eflicient device of this character, to furnish a novel means of supporting the wheel-carrying fork so as to take strain off its pivot, and to provide improved and effective means for maintaining the wheel normally in central position or in line with the trolley-pole.

The invention will first be described with reference to the accompanying drawings, which are to be taken as a part of this specilication, and it will then be defined more particularly in the annexed claims.

In said drawings, wherein corresponding parts in the different figures are indicated by the same reference characters, Figure l isla side elevation of an overhead trolley embodying my invention. Fig. 2 is a top plan view thereof. Fig. 3 is a front elevation. Fig. 4 is a plan view of a similar device, showing a modification, in that springs are employed for maintaining the trolley-wheel in central position.

The trolley-pole lis shown having at its upper end a horizontally-disposed rearward extension 2, formed with oppositely-projecting curved arms constituting' a segmental ork arciform support or track 3 for a roller 4, carried by the wheel-carrying arm 5. The trolley-wheel 7 is mounted in a rear end fork of the arm which arm is pivotally attached to the pole, preferably to the upper rearward extension 2 thereof, by means of a verticallydisposed pin or bolt 8. Said wheel-carrying arm is rearwardly upwardly inclined, but has, preferably, a horizontal pivot portion and has a depending lug or projection 6, which carries the roller 4.

The pivotal attachment of the wheel-carrying' arm or fork permits the fork to assume dierent angular positions with relation to the pole, and thus enables the wheel to swing' around or change its position to follow readily curves or changes in the line of the overhead wire. It will be seen that the pivot 8 of the swinging arm is relieved of all strain, for the arm and trolley-wheel carried thereby are supported by the roller 4, bearing on the curved track 3, while the bolt 8 is vertically inserted through horizontally-disposed portions of the pole and arm, thus practically preventing cross strains thereon.

Movement of the wheel-carrying arm or fork is properly limited by means of suitable stops, such as upstanding lugs 9, at the opposite ends of the curved track 3, which form abutments for the arm, as indicated by dotted lines in Fig. 2.

This device may be used either with or without springs to keep the fork and trolleywheel normally in central position. l, 2, and 3 no springs are represented, while in Fig. 4 the arm 5 is represented connected to the opposite lugs 9 by counteracting coiled springs l0, which of course resist swinging movement of the arm and tend to keep it in central position. However, such springs are unnecessary, for by reason of the improved way of supporting the wheel-carrying fork orarm it swings very readily and the wheel follows easily any changes in the line of the overhead wire, resuming its normal medial position as the wire runs a straight course. The use of springs may be undesirable, owing to their resistance against the quick swing of the arm.

When the trolley-pole is pulled down by the trolley-rope, it is desirable that the forked arm and wheel carried thereby should assume a medial position in line with the pole. ln

order to accomplish this end positively, the IOO In Figs.-

rope 11 is preferably formed at its upper part with a large loop, which is connected centrally to the arm 5 and passes at opposite sides thereoi' over pulleys 12, which may be mounted on the lugs 9 at the opposite ends of the curved track 3. To keep the rope on the pulleys, suitable guards, as 13, may be' employed` and the rope may also be passed around supplemental smaller pulleys 14 to keep the rope properly guided on the pulleys 12. It is obvious that when the rope is pulled to draw down the trolley the forked arm, with its wheel, will be drawn to the center.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent of the United States, ise

1. A trolley-wheel support comprising a trolley-pole having' at its upper end a rearward horizontally-disposed extension having a transverse segmental track, a wheel-carrying arm rearwardly upwardly inclined having at its front a vertically-disposed pivotal connection to said extension and having a depending lug carrying a roller which bears on said track, and stops or abutments at the opposite ends of said track for limiting the swing'- ing movement of said arm.

2. A trolley-wheel support comprising a trolley-pole having' opposite arms projecting therefrom, a wheel-carrying arm pivotally attached thereto, and a trolley-rope having a loop at its upper part mcdially attached to said wheel-carrying arm and passing around suitable guides at opposite ends of said oppositely-projecting arms.

3. A trolley-wheel support comprising a trolley-pole having at its upper part a transverse segmental track, a wheel-carrying arm pivotally attached thereto and carrying a roller which bears on said track, and a trolley-rope havingl an upper loop medially attached to said arm and passing around suitable guides at opposite ends of said track.

4. A trolley-wheel support comprising a trolley-pole having at its upper part a transverse segmental track, a wheel-carrying arm pivotally attached to said pole and having' a roller bearing on said track, upstanding abutments at opposite ends of said track for limiting the swinging movement of said arm, pulleys mounted on said abutments, and a trolley-rope having a loop passing over said pulleys and medially attached to said arm.

In testimony whereofl I aiiX my signature in presence of two witnesses..

US CLIDE C. CHAMBERS.

mark

Witnesses:

E. M. BIXLER, NVM. CHAMBERs. 

